Boiler



Patented Jan. 24, I899. D. B. KENNEDY.

BOILER.

(Application filed Jan. 29, 1897.)

4 Sheets-Sheet I.

(No Model.)

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No. 6l8,357. Patented Jan, 24, I899. D. B. KENNEDY.

BOILER.

(Application filed J in. 29, 1897.)

(No Model.) 4 Sheets-Shet 2.

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D.-B. KENNEDY.

BOILER.

(Applicatidn filed Jan. 29, 1897.) (No Model.) 4 Sheeis--Sheet 3.

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BOILER. (Application filed Jan. 29, 1897.) {N0 Modem 4 Sheet s$heet 4.

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lU NiTrn STATES PATENT Trier.

DIVIGIIT BRUCE KENNEDY, OF OAKMONT, PENNSYLVANIA, ASSIGNOR OF TIVO-THIRDS TO SIGNONO MUNOZ AND EDW'ARD C. DARLEY, OF CHICAGO, ILLINOIS.

BOILER.

SPECIFICATION forming part of Letters Patent No. 618,357, dated January 24, 1899.

Application filed January 29, 1897. Serial No. 621,162. (No model.)

l To all whom it may concern: ter-tubes being broken away at the front. l Be it known that I, DWIGHT BRUCE KEN- Fig. 3 is a plan view of my improved steam- NEDY, a citizen of the United States, residing generator, showing the side boxes or drums at Oakmont, in the county of Allegheny and in section. Fig. 4: is an enlarged detailed 5 State of Pennsylvania, have invented certain side sectional elevation of the front portion newand useful Improvements in Boilers; and of the boiler, showing the manner in which I do declare the following to be a full, clear, the drum is projected through the water-leg. and exact description of the invention, such Fig. 5 is a modified form of the connection as will enable others skilled in the art to which between the drum and water-leg. Fig. 6 is [0 it appertains to make and use the same, refan enlarged sectional perspective View of the erence being had to the accompanying drawrolled section used in the construction of the ings, and to the figures of reference marked water-legs. Fig. 7 is a sectional side elevathereon, which form a part of this specification of one of the hand-openings formed in tion. the water-legs, showing the cover and inner 15 My invention relates to an improvement in flange of the same. Fig. Sis an end sectional boilers or steam-generators; and it consists elevation of a portion of the drum, showingin the certain details of construction and the manner of riveting the same together in combination of parts, as will be fully deorder that a perfect circle may be formed. scribed hereinafter. To construct a boiler or steam-generator in 20 This invention relates to that class or type accordance with my invention, 1 form from of boilers known in the art as water-tube sheet metal one or more drums consisting of boilers; and the particular features of the a cylindrical shell 1, closed at each end by invention are, first, in projecting the steam suitable flanged heads 4, the parts or sheets drum or drums through the water-legs, thereof the said shell being joined together at the 25 by greatly adding to the strength of the contop by means of a plate 8, securely riveted in struction and avoiding the use of stay bolts the manner shown at Fig. 8 on the drawings. or braces and establishing a communication This manner offorming the drum 1 will give between the said drums and water-legs by a complete circle in cross-section without the perforating the former at the proper points; usual lap and permit the same to be passed 30 second, to cheapen and strengthen the conthrough openings formed in the front and struction of the water-legs by means of a perear water -legs, thereby forming a steamripheral rolled section or shape, and, third, to space in the said legs 2 3 above the top of the construct and arrange the hand-openings opdrums 1. The preferred method of attachpositethe water-tubesin theforin of an oval or ing or connecting these drums 1 with the 3 5 ellipse having an inwardly-projecting flange, front and rear water-legs 2 3 is made by means against which the covers will find a bearing, of angle or flanged rings 7, (see Fig. 4,) arand also to so arrange bathe-plates with refranged about the drums at the front and rear erence to the steam-outlet that will insure the at the points of intersection of the water-legs best results, together with other advantages and the parts securely riveted. To establish 0 that will be particularly referred to in the a communication between the drum 1 and the 0 following description and pointed out in the water-legs 2 3, a series of perforations or claims. openings 5 are formed through that portion In the accompanying drawings, Figure 1 is of the said drum inclosed within the watera front elevation of my improved boiler or legs. The preferred form of the water-legs 5 steam-generator which is constructed and ar- 2 3 will be best seen at Figs. 1, 2, and 4: of 5 ranged in accordance with my invention, a the drawings, which show the front andrear part of the said view being shown in section plates formed from single pieces of metal, the better to show the arrangement of the each having a smooth uninterrupted surface water-tubes and stay-bolts. Fig. 2 is a side without bend and inclined at an angle to the 50 elevation of the same, a part of the side wadrums. Each of these water-legs 2 3 consists I00 of a front and rear plate attached the one with the other, side by side and parallel, by means of a rolled section U-shaped in crosssection arranged inside the periphery of the said plates, the said section being in the form of a channel-bar bent to the contour of the water-leg and securely riveted about its flanges to the plates forming the water-leg. To strengthen and brace the plates of the water-legs, a number of stay-bolts 6 are arranged in regular order between the same. Formed in the front sheet of the water-leg 2 and in the rear sheet of the leg 3 are a series of oval or elliptical openings 14E to form handholes, one of which is located opposite to each extremity of the inclined water tubes 10. These openings 14 are each formed with an inner flange, against which a cover 20 is placed and the said cover held in position by a bolt and arch piece 21. These openings thus formed will permit the oval or elliptical cover 20 to be easily passed through the said openings and be secured against the inner flange to form a steam-tight connection and resist the outward pressure of the steam within the water-legs. Connecting the front 2 and rear waterdegs 3, the one with the other, are a series of water-tubes 10, arranged at a right angle with the said legs and in parallel rows.

At the top of the front water-leg 2, between the drums, is a steam-outlet 13, which is located at a point above the water-line and is protected by baffle-plates, (see Fig. 1,) one of which, 12, is located between the two drums 1 and the other plates 11 at each outer side thereof. These plates 11 12 are perforated to permit the steam to ascend and form a barrier to prevent the water rising to the steamopening above.

At each side of the boiler are placed boxes or supplemental drums 15 17, each of which is formed from sheet metal bent in the form of the letter U in cross-section, the open outer side of which is fitted with a rolled section 9, securely riveted thereto, in a manner that will form a box. These boxes 15 17 are arranged in pairs, the one above the other, and connected by water-tubes 16, preferably in double rows placed as close together as possible, practically forming side walls for the boilersetting. Each of these boxes 15 17 is provided with oval hand-openings 1i opposite the extremity of each tube and the top boxes 17, having connections 18 with the drums 1,while the lower boxes 15 are provided with connections 19 with the rear water-leg. These connections 18 19 will insure the proper circulation between the several parts of the boiler.

The rear water-leg 3 is similar in every respect to the front, except that the same is made somewhat longer, the reason of which is obvious.

Each of the side boxes 15 17 is provided with the oval hand-openings 14, formed with the inner flange in the same manner as those above described and arranged opposite to all the vertical water-tubes 16.

At Fig. 5 on the drawings I have shown a modified form of connection for connecting the drums to the water-legs, which consists in fianging the openings through which the drums are passed both at the front and rear and riveting the said flanges 7 to the drums. It will be noticed that the front and rear plates forming the water-leg are in two pieces, riveted in horizontal seams, and to simplify the forming of the flanges 7 and to give the water-tubes 10 the proper angle of inclination a slight bend is made at or near the connection of the sheets. The same rolled section 9 and arrangement of the other parts of the boiler are the same in this modification as that of the preferred form above described.

It is obvious that other modifications may be made without departing from the spirit of my invention. Therefore I do not confine myself to the exact construction shown and described.

Having thus described my invention, I claim 1 1. In a boiler, the combination of inclined water-legs, a horizontal drum projecting through said legs and secured thereto by flanges and rivets whereby said legs are strengthened and supported, and a series of inclined water-tubes secured to said legs beneath the drum; said drum being perforated at its parts surrounded by the legs, substan* tially as set forth.

2. In a water-tube boiler such as described,

the drums of which project through the waterlegs, a central baffle-plate resting upon the said drums, in combination with side bafiieplates at each side of the same, said plates arranged within the legs above the Water-line, whereby a barrier is formed between the steam-outlet opening above and the water beneath, as and for the purpose set forth.

3.. A boiler comprising water legs, the drums projecting through the water-legs below the upper ends thereof to provide steamspaces connected with the drums, the longitudinal water-tubes connecting the legs, the supplemental side drums each consisting of upper and lower V-shaped portions fitted with rolled sections and vertical, closely-arranged, water-tubes l6 connecting said portions, and the connection between the water-legs and the side drums; substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

' DWIGHT BRUCE KENNEDY.

WVitnesses:

G. E. ALTER, II. G. EISENBEIS. 

